620351680 has 84 divisors (see below), whose sum is σ = 1599724512. Its totient is φ = 229032960.

The previous prime is 620351671. The next prime is 620351701. The reversal of 620351680 is 86153026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48345 + ... + 59815.

Almost surely, 2^620351680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620351680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (799862256).

620351680 is an abundant number, since it is smaller than the sum of its proper divisors (979372832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620351680 is a wasteful number, since it uses less digits than its factorization.

620351680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11514 (or 11491 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 620351680 is about 24906.8600991775. The cubic root of 620351680 is about 852.8630926948.

The spelling of 620351680 in words is "six hundred twenty million, three hundred fifty-one thousand, six hundred eighty".